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Compare the published Medicare service mix of James Roat, M.D. with clinicians in the same registry specialty: Gastroenterology · Internal Medicine (CMS).

IA · Exact areaEdit location

2024 published service data · 77 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Krishnarao Venkata Gorrepati, MD

Gastroenterology · Internal Medicine (CMS) · Dubuque, IA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
  • Colorectal cancer screening; colonoscopy on individual at high risk (G0105)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
78%Service-mix similarityView profile →

Jeffrey Alan Brannen, DO

Gastroenterology (CMS) · Clive, IA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
  • Colorectal cancer screening; colonoscopy on individual at high risk (G0105)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
74%Service-mix similarityView profile →

Douglas J Purdy, MD

Gastroenterology (CMS) · Cedar Rapids, IA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
  • Colorectal cancer screening; colonoscopy on individual at high risk (G0105)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
73%Service-mix similarityView profile →

Christopher James Mulder, DO

Gastroenterology · Internal Medicine (CMS) · Clive, IA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
  • Colorectal cancer screening; colonoscopy on individual at high risk (G0105)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
73%Service-mix similarityView profile →

Bernard Ira Leman, MD

Gastroenterology · Internal Medicine (CMS) · Clive, IA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
  • Colorectal cancer screening; colonoscopy on individual at high risk (G0105)
  • Dilation of esophagus (43450)
72%Service-mix similarityView profile →

Michael D Obrien, MD

Gastroenterology (CMS) · Clive, IA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
  • Colorectal cancer screening; colonoscopy on individual at high risk (G0105)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
70%Service-mix similarityView profile →

Srinivas Kalala, M.D.

Gastroenterology (CMS) · Waterloo, IA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
  • Colorectal cancer screening; colonoscopy on individual at high risk (G0105)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
69%Service-mix similarityView profile →

Leon L Qiao, M.D.

Gastroenterology · Internal Medicine (CMS) · Cedar Rapids, IA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
  • Colorectal cancer screening; colonoscopy on individual at high risk (G0105)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
69%Service-mix similarityView profile →

Benjamin Pottebaum, D.O.

Gastroenterology · Internal Medicine (CMS) · Clive, IA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
  • Colorectal cancer screening; colonoscopy on individual at high risk (G0105)
  • Dilation of esophagus (43450)
68%Service-mix similarityView profile →

Satish K Sondhi, M.D.

Gastroenterology (CMS) · Mason City, IA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
  • Colorectal cancer screening; colonoscopy on individual at high risk (G0105)
  • Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk (G0121)
68%Service-mix similarityView profile →

Stacey S Roberts, MD

Gastroenterology · Internal Medicine (CMS) · Clive, IA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
  • Colorectal cancer screening; colonoscopy on individual at high risk (G0105)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
68%Service-mix similarityView profile →

Young B Huh, MD

Gastroenterology · Internal Medicine (CMS) · Bettendorf, IA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
  • Colorectal cancer screening; colonoscopy on individual at high risk (G0105)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
67%Service-mix similarityView profile →
How this comparison works

We use the same calendar year of CMS Medicare Physician & Other Practitioners data for both providers. Published non-drug service counts are combined by HCPCS code across places of service. We apply log(1 + count), normalize the vectors, and compare them using cosine similarity.

Candidates share the reference provider’s current NPPES primary taxonomy and match the location you enter. We examine up to 500 candidates in NPI order, then show up to 12 with the highest positive similarity within that set. The score is not a percentile, medical recommendation, or prediction. Suppressed services are not estimated. Medicare fee-for-service data does not describe a provider’s entire practice.

Source: CMS Medicare Physician & Other Practitioners - by Provider and Service : 2024-12-01 · Published May 21, 2026.